Bicycle-crank.



No. 654,560. Patented July 24, I900.

. A. ANDZIEWICZ.

BICYCLE CRANK.

(Applicatiox; filed Feb. 24, 1899.)

(No Model.)

W/ TNE SSE S IN VENTOI? rim '7 nine BICYCLE-CRANK.

SPECIFICATION forming part of Letters Patent No. 654,560, dated July 24,1900. Application filed February 24,1899. Serial No. 706,706. N model-JTo all whom it may concern:

Be it known that I, ANTONI Annzrnwioz,

acitizen of the United States of America, re-- siding at Chicago, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in Bicycle-Cranks, of which the following is aspecification.

Referring to the accompanying drawings, wherein like reference-lettersindicate the same or corresponding parts, Figure lisa side elevation ofa bicycle equipped with my improved pedal-crank. Fig. 2 is a detail ofmy novel pedal-crank.

The object of my invention is to produce an improved adjustable bicyclepedaLcrank; and to that end it consists in the features of constructionand combinations hereinafter to be more particularly described, and setforth in the claims hereto annexed.

In the drawings, A is av bicycle equipped with my novel pedal-crank 0.

Referring to Fig. 2, O is a pedal-crank formed of two parts 0 c, saidparts having the ends 0 c threaded in opposite directions. D is adouble-threaded nut or sleeve adapted when turned in one direction toengage the threaded ends 0 c and draw them together and when screwed inthe opposite direction to cause said ends to separate the one from theother. (I d are clench-nuts respectively adapted to be upwardly ordownwardly adjustable upon the threads c o.

The operation of this form of my device is as follows: When it isdesired to lengthen the pedal-crank C, the clench-nuts d d are screwedaway from the nut or sleeve D and the nut D is turnedin the directionwhich causes the parts 0 c to separate. When they are separated thedistance desired, the clenchnuts may again be made to come in contactwith the nut D, preventing the same from turning and the parts 0 c fromchanging their position toward each other. When it is desired to shortenthe length of the pedal-crank, if the parts a c are not in contact witheach other the operation described above may be reversed until such timeas the parts meet.

It will be seen also that by loosening the clench-nuts cl (1 and bymeans of the nut D and by separating the parts 0 c the pedal E may beturned to the right or left to such an extent, if desired, as to projectinwardly and may be retained in that position by means of the nuts D clc7, in the manner hereinbefore described.

The advantages of my novel pedal-crank are many, among which are, first,the pedals may be turned inwardly for purposes of shipment or they maybe turned outwardly; secondly, it not infrequently happens that bicyclepedal-pins through accident become bent, so as to occasion greatdiscomfort to the rider, to overcome which it is necessary to straightenthe pedal-pinrwhich necessity may often be removed when the pedal-crankof my invention is employed, as the same result can be accomplished byturning the pedal in one or the other direction, and, again, it Veryfrequently happens that bicycle-riders find upon trial that thepedal-cranks of their bicycles are not of the desired length, and toobtain the same they are obliged to procure other cranks, which isrendered entirely unnecessary by my invention, that permits the lengthof the pedal-crank to be varied.

It is obvious that the threads 0 0 may be of any length and that insteadof forming the pedal-crank C of two parts it may be formed of more thantwo parts, with a corresponding number of nuts D cl cl and threads 0 c"and in the equivalent form a corre-' sponding number of nuts D andthreads 0 0 Having thus described myi'nvention, what I claim as new, anddesire to secure by Letters Patent, is

1. An improved longitudinally-adjustable pedal-crank consisting of twoseparate parts, the adjacent ends of each part provided withscrew-threads, an internally-screw-threaded sleeve adapted to receivethe screw-threaded ends of said separate parts, and independent lockingmembers between said sleeve and said parts, whereby the two parts may belongitudinally adjusted and independently locked in respect to saidsleeve, substantially as described.

2. An improved l0ngitudinally-adjustable pedal-crank consisting of twoseparate and independent parts each having their adjacent ends screwthreaded, a screw-threaded sleeve adapted to receive the screwthreadedends of said separate parts, and means for looking said separate partsagainst relative rotary movement in respect to said sleeve at any pointthroughout their range of travel in said sleeve, substantially asdescribed.

ANTONI ANDZIEWICZ.

